This site is funny, I didn't want to post on my current stocking in my 225g as it just showed a huge line of warnings...But I did do one for my 450g and it stilled showed a bunch of warnings lol.
This test was with 3 silver aros, 2 Pbass, 3 Siamese Tiger Pulcher, and a RTC and this is what I got.
Warning: Peacock Bass Ocellaris is not recommended for your tank - it may eventually outgrow your tank space, potentially reaching up to 25 inches.
Warning: Red Tailed Catfish is not recommended for your tank - it may eventually outgrow your tank space, potentially reaching up to 60 inches.
Warning: Red Tailed Catfish requires a tank with more height.
Warning: Your selected species may eventually require 546% of your aquarium space. You may need to deal with territorial aggressions later on. Try removing some of (Datnioides pulcher, Phractocephalus hemioliopterus) or get a larger aquarium tank.
Recommended temperature range: 24 - 27 C.
Recommended pH range: 6.5 - 7.5.
Recommended hardness range: 5 - 15 dH.
You have plenty of aquarium filtration capacity.
Your aquarium filtration capacity for above selected species is 135%.[SIZE=-1] [/SIZE]
Recommended water change schedule: 62% per week. (You might want to split this water change schedule to two separate 38% per week)
Your aquarium stocking level is 159%. </B>